CN102185776B - The method of Ethernet Layer 2 Multicast Fast Convergent and Ethernet system - Google Patents
The method of Ethernet Layer 2 Multicast Fast Convergent and Ethernet system Download PDFInfo
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- CN102185776B CN102185776B CN201110120018.1A CN201110120018A CN102185776B CN 102185776 B CN102185776 B CN 102185776B CN 201110120018 A CN201110120018 A CN 201110120018A CN 102185776 B CN102185776 B CN 102185776B
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Abstract
The present invention relates to a kind of method and Ethernet system of Ethernet Layer 2 Multicast Fast Convergent, the method comprises: node is determined the port that breaks down or the port got clogged have users, and due to this fault or get clogged and will cause this user offline; Structuring user's place group leave message, the maximum response time that message is left in setting is predetermined value, and requestor receives and leaves message, judges that maximum response time is predetermined value according to leaving message, then send query message to its all non-multicast routed port; The upstream device of requestor receives query message, and response query message completes the switching of flux of multicast.To solve when link topology changes, the problem that multicast service can not switch fast, ensures the reliability and stability of multicast service.
Description
Technical field
The present invention relates to ethernet technology field, specifically the method for Ethernet Layer 2 Multicast Fast Convergent and Ethernet system.
Background technology
In recent years, along with the universal rapidly of the Internet and popularization, the application commercially of multicasting technology and Ring network technologies is more and more extensive.
Multicasting technology refers to a kind of network communications technology of the corresponding multiple recipient of single sender, it achieve the point-to-multipoint effective rate transmission in IP (Internet protocol) network service, effectively can save the network bandwidth, reduce offered load, be widely used in all many-sides such as real time data transmission, multimedia conferencing, data copy, game and emulation.
Ring network technologies is a kind of real-time link redundancy technique; the reliability transmission that it is business datum provides guarantee; in breaking down at primary link, in time data traffic is switched to backup link; have effectively achieved link protection function; solve the problem that traditional data net protective capability is weak, failure recovery time is long; the quick protective feature of 50ms can be provided in theory, simultaneously compatible traditional Ethernet protocol.
IGMP (IGMP) is a multicast protocol in Internet Protocol family, and current IGMP has three kinds of versions, i.e. IGMPv1, v2 and v3.It is mainly used to IP main frame and and the multicast router of its direct neighbor between set up, safeguard multicast group membership.Main frame needs the igmp querying message responding multicast router, namely with IGMP Membership Report message response; Router periodically sends membership query's message, then determine whether certain particular group has main frame to add on oneself place subnet according to the response message received, and when receive main frame exit the report of group time, send the query message (IGMPv2) of particular group, to determine whether certain particular group exists without member.
IGMPSnooping (internet group management snoopy protocol) is the multicast tied mechanism operated on two-layer equipment, for management and control multicast group.Run the two-layer equipment of IGMPSnooping by analyzing the IGMP message received, for port and MAC (MediaAccessControl, hardware address) multicast address sets up mapping relations, and according to such mapping relations multicast data forwarding.When two-layer equipment does not run IGMPSnooping, multicast packet is broadcasted at two-layer equipment; After two-layer equipment has run IGMPSnooping, the multicast packet of known multicast group can not be broadcasted at two-layer equipment, and at two-layer equipment by multicast to the recipient specified.
At present, in the two-tier multicast link network using IGMPSnooping agreement, configuration querying device on the equipment of most upstream usually, is sent IGMP general polling message to upstream device and is obtained by periodic the message that user adds or leave multicast group.In addition, when upstream equipment from certain port receive leave message time, if this port exists and leaves group specified in message, so it will generate group-specific query message, inquires about in the subnet be connected with it data message that whether also there is other main frame and need to receive particular group.If after upstream device or user receive igmp querying message, the port receiving query message will be set to IGMP routed port, and send the IGMP report message will inquiring about group to routed port.
According to this principle, current under two layers of loop network link environment, the convergence process in second-layer multicast forwarding path is: when primary link breaks down, flux of multicast can not be switched to backup link from primary link at once and to get on forwarding, but wait upstream igmp querying device to send out general polling message next always, and when main frame transmission IGMP report message responds this inquiry, two layers of link just can relearn IGMP report message to upgrade conversion link, flux of multicast is just switched on backup link.When primary link failure recovers, backup link can be fallen by two layers of looped network protocol blocks, but flux of multicast also can not switch back to primary link from backup link at once, and still will wait for the time in a general polling cycle.Under normal circumstances, the general polling cycle is a few minutes, and that is, during this, flux of multicast normally can not complete switching, and namely multicast service is always obstructed.Thus the multicast service in two layers of looped network just can not Fast Convergent, and its reliability reduces greatly.
Summary of the invention
Main purpose of the present invention is to provide a kind of method and Ethernet system of Ethernet Layer 2 Multicast Fast Convergent, and to solve when link topology changes, the problem that multicast service can not switch fast, ensures the reliability and stability of multicast service.
The technical solution adopted for the present invention to solve the technical problems is:
A method for Ethernet Layer 2 Multicast Fast Convergent, it comprises:
Node is determined to break down on port or the port that gets clogged and is had users, and the equipment that port or the user that gets clogged on port will break down port or the port place that gets clogged from this and this breaks down rolls off the production line;
User place group described in joint structure leave message, the maximum response time leaving message described in setting is predetermined value, and the described message that leaves is mail to Multicast Routing port;
Requestor leaves message described in receiving, and judges that described maximum response time is predetermined value according to the described message that leaves, then send query message to its all non-multicast routed port, otherwise terminate this flow process;
The upstream device of described requestor receives described query message, responds described query message and carries out the switching of flux of multicast.
Preferably, described node leaves after message mails to Multicast Routing port by described, comprises further: leave message described in agent equipment receives, and by the described message repeating that leaves to described requestor.
Preferably, described node is determined to break down on port and is had users, and the user on this non-working port will be rolled off the production line from the equipment at this non-working port place, specifically comprises:
Ports physical state becomes closedown DOWN from opening UP; Or the logic state of port becomes obstruction FORWARD from forwarding FORWARD; Or port is Multicast Routing port, and the logic state of this port becomes BLOCK from FORWARD, and this node exists multicast user.
Preferably, XM is determined to break down on port and is had users, and user on this non-working port from after the equipment at this non-working port place rolls off the production line, will comprise further:
The port got clogged described in determining is Multicast Routing port, and determines on this Multicast Routing port, which VLAN gets clogged, and determines that this node exists the multicast user in described VLAN.
Preferably, described non-working port is that physics is by the port of DOWN.
The present invention also provides a kind of Ethernet system, comprising:
Node, determining to break down on port or the port that gets clogged for node has users, and the equipment that port or the user that gets clogged on port will break down port or the port place that gets clogged from this and this breaks down rolls off the production line,
What then construct described user place group leaves message, and the maximum response time leaving message described in setting is predetermined value, and the described message that leaves is mail to Multicast Routing port;
Requestor, leaves message described in receiving, and judges that described maximum response time is predetermined value according to the described message that leaves, then send query message to its all non-multicast routed port;
The upstream device of requestor, for receiving described query message, responding described query message and carrying out the switching of flux of multicast.
Preferably, described system also comprises: agent equipment, described in receiving, leave message, and by the described message repeating that leaves to described requestor.
Preferably, described node, for determining that ports physical state becomes DOWN from UP, causes user offline; Or the logic state of port becomes BLOCK from FORWARD, causes user offline; Or port is Multicast Routing port, and the logic state of this port becomes BLOCK from FORWARD, and node described in this exists multicast user.
Described node, the port also for getting clogged described in determining is Multicast Routing port, and determines on this Multicast Routing port, which VLAN gets clogged, and determines that this node exists the multicast user in described VLAN.
Preferably, described node, becomes closedown DOWN for ports physical state from opening UP; Or the logic state of port becomes obstruction FORWARD from forwarding FORWARD; Or port is Multicast Routing port, and the logic state of this port becomes BLOCK from FORWARD, and this node exists multicast user.
Preferably, described non-working port is that physics is by the port of DOWN.
Implement technical scheme of the present invention, there is following beneficial effect: method and system provided by the invention, by informing requestor leaving in message the time setting peak response, the upstream device of requestor is enable to respond this requestor, complete link to connect, to solve when link topology changes, the problem that multicast service can not switch fast, ensures the reliability and stability of multicast service.
Accompanying drawing explanation
The first method flow chart that Fig. 1 provides for the embodiment of the present invention;
The flow chart of the second method that Fig. 2 provides for the embodiment of the present invention;
The system construction drawing that Fig. 3 provides for the embodiment of the present invention;
Another structure chart of system that Fig. 4 provides for the embodiment of the present invention;
Fig. 5 provides the structural representation of the application example of Ethernet topology for the embodiment of the present invention;
Fig. 6 provides the structural representation of the Another Application example of Ethernet topology for the embodiment of the present invention;
Fig. 7 provides the structural representation of the another application example of Ethernet topology for the embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The embodiment of the present invention provides a kind of method of Ethernet Layer 2 Multicast Fast Convergent, and time the method that this embodiment provides is applied to the link occurs fault when flux of multicast, as shown in Figure 1, the method comprising the steps of:
S110, node are determined the port that breaks down has users, and will cause this user offline due to this fault; Concrete:
First detect that link topology changes, this change comprises three kinds of situations: one, and ports physical state becomes DOWN from UP, causes user offline; Two, the logic state of port becomes BLOCK from FORWARD, causes user offline; Three, port is Multicast Routing port, and the logic state of this port becomes BLOCK from FORWARD, and node described in this exists multicast user.
User place group described in S120, joint structure leave message, the maximum response time leaving message described in setting is predetermined value, and the described message that leaves is mail to Multicast Routing port; Concrete:
When the link occurs fault of flux of multicast time, node is determined the port that breaks down has users, and because this fault will to cause this user offline, what then this node needed to construct these user place groups leaves message, the maximum response time field left in message is filled to 255, in other examples, this field also can be filled to other predetermined value, then mails to the Multicast Routing port of this node.
Leave message described in S130, requestor receive, judge that described maximum response time is predetermined value according to the described message that leaves, then send query message to its all non-multicast routed port; Otherwise terminate this flow process.Concrete:
When requestor receives after this leaves message, need to judge maximum response time field wherein, if 255, then send out query message (as: group-specific query or general polling message) to its all non-multicast routed port.
The upstream device of S140, described requestor receives described query message, responds described query message and carries out the switching of flux of multicast.
This upstream device is by sending this query message of response that joins message, and this active user is likely above-mentioned user, is not also likely above-mentioned user.This upstream device can be the network equipment of this requestor next stage, also can be user.
In the method, also comprise step further: described in agent equipment receives, leave message, and by the described message repeating that leaves to described requestor.
Agent equipment, when message is left in forwarding, does not revise the maximum response time field value in (this field can set to 0 when acting on behalf of and forwarding by some manufacturer) message.If do not have agent equipment, then node directly will leave message from Multicast Routing port and be sent to requestor.
The method is when the link occurs fault of flux of multicast, by informing requestor leaving in message the time setting peak response, the upstream device of requestor is enable to respond this requestor, complete link to connect, to solve when link topology changes, the problem that multicast service can not switch fast, ensures the reliability and stability of multicast service.
The embodiment of the present invention provides a kind of method of Ethernet Layer 2 Multicast Fast Convergent, and time the method that this embodiment provides is applied to the link occurs fault when flux of multicast, as shown in Figure 2, the method comprises:
S210, node are determined the port that gets clogged has users, and have user because described port block causes rolling off the production line; More specifically, this step S210 comprises: first detect that link topology changes, and this change comprises three kinds of situations: one, and ports physical state becomes DOWN (closedown) from UP (opening), and namely state change can cause user offline; Two, the logic state of port becomes BLOCK (obstruction) from FORWARD (forwarding), and namely state change can cause user offline; Three, port is Multicast Routing port, and the logic state of this port becomes BLOCK from FORWARD, and node described in this exists multicast user.
In other examples, after described step S210, comprise further:
If the port got clogged described in determining is Multicast Routing port, and determine on this Multicast Routing port, which VLAN gets clogged, and determine that this node exists the multicast user in described VLAN, this multicast user is user.
User place group described in S220, joint structure leave message, the maximum response time leaving message described in setting is predetermined value, and the described message that leaves is mail to Multicast Routing port;
When the link failure recovery of flux of multicast time, node is determined the port that breaks down has users, and because this fault will to cause this user offline, what then this node needed to construct these user place groups leaves message, the maximum response time field left in message is filled to 255, in other examples, this field also can be filled to other predetermined value, then mails to the Multicast Routing port of this node.
Leave message described in S230, requestor receive, judge that described maximum response time is predetermined value according to the described message that leaves, then send query message to its all non-multicast routed port, if not, then terminate this flow process; Concrete:
When requestor receives after this leaves message, need to judge maximum response time field wherein, if 255, then send out query message (as: group-specific query or general polling message) to its all non-multicast routed port.
The upstream device of S240, described requestor receives described query message, responds described query message and carries out the switching of flux of multicast, to accelerate flux of multicast convergence in a link.
This upstream device is by sending this query message of response that joins message, and this active user is likely above-mentioned user, is not also likely above-mentioned user.
In the method, also comprise step further: described in agent equipment receives, leave message, and by the described message repeating that leaves to described requestor.
Agent equipment, when message is left in forwarding, does not revise the maximum response time field value in (this field can set to 0 when acting on behalf of and forwarding by some manufacturer) message.If do not have agent equipment, then node directly will leave message from Multicast Routing port and be sent to requestor.
The method is when the link failure recovery of flux of multicast, by informing requestor leaving in message the time setting peak response, the upstream device of requestor is enable to respond this requestor, complete link to connect, to solve when link topology changes, the problem that multicast service can not switch fast, ensures the reliability and stability of multicast service.
The embodiment of the present invention also provides a kind of Ethernet system, and as shown in Figure 3, system comprises:
Node 310, for determining the port broken down has users, and this user offline will be caused due to this fault, what then construct described user place group leaves message, the maximum response time leaving message described in setting is predetermined value, and the described message that leaves is mail to Multicast Routing port; More specifically, this node 310 is for determining that ports physical state becomes DOWN from UP, and namely state change can cause user offline; Or the logic state of port becomes BLOCK from FORWARD, namely state change can cause user offline; Or port is Multicast Routing port, and the logic state of this port becomes BLOCK from FORWARD, and node described in this exists multicast user.
Requestor 320, leaves message described in receiving, and judges that described maximum response time is predetermined value according to the described message that leaves, then send query message to its all non-multicast routed port;
The upstream device 330 of requestor, for receiving described query message, responding described query message and carrying out the switching of flux of multicast, to accelerate flux of multicast convergence in a link.
In other examples, this system as shown in Figure 4, also comprises: agent equipment 311, described in receiving, leave message, and by the described message repeating that leaves to described requestor 320.
The method is when the link occurs fault of flux of multicast, by informing requestor leaving in message the time setting peak response, the upstream device of requestor is enable to respond this requestor, complete link to connect, to solve when link topology changes, the problem that multicast service can not switch fast, ensures the reliability and stability of multicast service.
The present invention also provides another kind of Ethernet system, and as shown in Figure 3, this system comprises:
Node 310, for determining the port got clogged has users, and there is user because described port block causes rolling off the production line, what then construct described user place group leaves message, the maximum response time leaving message described in setting is predetermined value, and the described message that leaves is mail to Multicast Routing port; More specifically, this node 310 is for determining that ports physical state becomes DOWN from UP, and namely state change can cause user offline; Or the logic state of port becomes BLOCK from FORWARD, namely state change can cause user offline; Or port is Multicast Routing port, and the logic state of this port becomes BLOCK from FORWARD, and node described in this exists multicast user.
Requestor 320, leaves message described in receiving, and judges that described maximum response time is predetermined value according to the described message that leaves, then send query message to its all non-multicast routed port;
The upstream device 330 of requestor, for receiving described query message, responding described query message and carrying out the switching of flux of multicast, to accelerate flux of multicast convergence in a link.In this this system, if the rear of requestor does not connect upstream device, then directly connect user
In other examples, further, described node 310, port also for getting clogged described in determining is Multicast Routing port, and determine on this Multicast Routing port, which VLAN gets clogged, and determine that this node 310 exists the multicast user in described VLAN, this multicast user is user.
This system is when the link failure recovery of flux of multicast, by informing requestor leaving in message the time setting peak response, the upstream device of requestor is enable to respond this requestor, complete link to connect, to solve when link topology changes, the problem that multicast service can not switch fast, ensures the reliability and stability of multicast service.
Said method and systematic difference example are described below:
Application example one:
Topology as shown in Figure 5.This topology is comprise: the Ethernet topology of source server, switch and user's composition, wherein, switch S0, S1, S2, S3 and S4 open IGMPSnooping function, switch S1, S2, S3, S4 form a loop, switch S1-> S2-> S3 is primary link, and switch S1-> S4-> S3 is backup link.The wherein port one Configuration Agent requestor of switch S0, the port 3 of switch S1, the port 2 of switch S2,1 and the port 2 of switch S3, the port one of switch S4 are all Multicast Routing port (dynamic or be configured to static state), after user's program request, be all formed with multicast user's list item at the port one of switch S1, the port one of switch S2, the port 3 of switch S3.In the normal situation of link, flux of multicast gets off along primary link.
When primary link breaks down, topology as shown in Figure 6, this topology is comprise: the Ethernet topology of source server, switch and user's composition, the state of the port one of switch S3 can enter FORWARD from BLOCK.The port one physical connection of switch S2 disconnects, and the user on port one will be rolled off the production line, and what now switch S2 constructed these users group leaves message, and the maximum response time field left in message is filled to be 255, then sends to port 2.Switch S1 receives after these leave message from port one, this is left message and sends from port 3, do not change maximum response time field value wherein.Switch S0 receives after these leave message from port one, whether the value judging maximum response time field in message is 255, if 255, then send query message from port one, can send at port one and port 2 after switch S1 receives query message, can abandon after switch S2 receives, can send from port 2 after switch S4 receives, multicast can be responded after switch S3 receives join message from port one and send, list item can be formed at port 2 after switch S4 receives, then send from port one, list item can be formed at port 2 after switch S1 receives, then send from port 3, list item can be formed at port one after switch S0 receives.Such data traffic just can be got off from backup link, thus forms Fast Convergent.
When primary link failure recovers, as shown in Figure 5, the state of the port one of switch S3 can enter BLOCK from FORWARD again.Now the port one of switch S3 is Multicast Routing port, and S3 has multicast user's list item (on port 3), therefore, what switch S3 can construct all multicast user groups above it leaves message, this maximum response time field left in message is filled to be 255, then sends to port one and port 2.Owing to there is no multicast user's list item on switch S2, therefore can not this leave message to Multicast Routing port repeat, directly abandon; And switch S4 has multicast user's list item, therefore can leave message to Multicast Routing port repeat.The subsequent step during link occurs fault of follow-up step just and described in the last period is similar, therefore repeats no more here.After the node on primary link again receives and joins message, have switched fast when flux of multicast just completes link-recovery.
Application example two:
Topology as shown in Figure 7.Topology, this topology is comprise: the Ethernet topology of source server, switch and user's composition, and the topology of topological sum Fig. 5 is as shown in Figure 7 similar, and just the port blocked of loop is no longer the port one of switch S3, but the port 2 of switch S4.
Link failure treatment step when primary link breaks down and in application example one is similar, no longer repeats here.
And when primary link failure recovers, as shown in Figure 7, the state of the port 2 of switch S4 can enter BLOCK from FORWARD, the port 2 of now switch S4 there is user's list item, therefore, what switch S2 can construct users' group that these roll off the production line leaves message, and the maximum response time field left in message is filled to be 255, then sends to port one.Follow-up step is identical with the process of application example one link occurs fault above, therefore repeats no more.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a method for Ethernet Layer 2 Multicast Fast Convergent, is characterized in that, comprising:
Node is determined to break down on port or the port that gets clogged and is had users, and this non-working port or the user that gets clogged on port will be rolled off the production line from the equipment at this non-working port or the port place that gets clogged;
Described in joint structure, user place group leaves message, the maximum response time leaving message described in setting is predetermined value, and the described message that leaves is mail to Multicast Routing port, wherein, when there being agent equipment, leave message described in agent equipment receives, do not revise maximum response time field value, directly by the described message repeating that leaves to requestor;
Requestor leaves message described in receiving, and judges that described maximum response time is predetermined value according to the described message that leaves, then send query message to its all non-multicast routed port, if not then process ends;
The upstream device of described requestor receives described query message, responds described query message and carries out the switching of flux of multicast.
2. method as claimed in claim 1, is characterized in that, described node is determined to break down on port and had users, and the user on this non-working port will be rolled off the production line from the equipment at this non-working port place, specifically comprises:
Ports physical state becomes closedown DOWN from opening UP; Or the logic state of port becomes obstruction BLOCK from forwarding FORWARD; Or port is Multicast Routing port, and the logic state of this port becomes BLOCK from FORWARD, and this node exists multicast user.
3. method as claimed in claim 1, it is characterized in that, described non-working port is that physics is by the port of DOWN.
4. the method for claim 1, is characterized in that, XM is determined to get clogged on port and had users, and the equipment that this user got clogged on port will get clogged port place from this rolls off the production line, and afterwards, comprises further:
The port got clogged described in determining is Multicast Routing port, and determines on this Multicast Routing port, which virtual LAN VLAN gets clogged, and determines that this node exists the multicast user in described VLAN.
5. an Ethernet system, is characterized in that, comprising:
Node, have users on determine to break down port or the port that gets clogged, the equipment that port or the user that gets clogged on port will break down port or the port place that gets clogged from this and this breaks down rolls off the production line, what then construct described user place group leaves message, the maximum response time leaving message described in setting is predetermined value, and the described message that leaves is mail to Multicast Routing port;
Requestor, leaves message described in receiving, and judges that described maximum response time is predetermined value according to the described message that leaves, then send query message to its all non-multicast routed port;
The upstream device of requestor, for receiving described query message, responding described query message and carrying out the switching of flux of multicast;
Agent equipment, leaves message described in receiving, and does not revise maximum response time field value, and by the described message repeating that leaves to described requestor.
6. system as claimed in claim 5, is characterized in that, described node, for determining that ports physical state becomes DOWN from UP, causing user offline; Or the logic state of port becomes BLOCK from FORWARD, causes user offline; Or port is Multicast Routing port, and the logic state of this port becomes BLOCK from FORWORD, and node described in this exists multicast user;
Described node, the port also for getting clogged described in determining is Multicast Routing port, and determines on this Multicast Routing port, which VLAN gets clogged, and determines that this node exists the multicast user in described VLAN.
7. system as claimed in claim 5, is characterized in that,
Described node, becomes closedown DOWN for ports physical state from opening UP; Or the logic state of port becomes obstruction FORWARD from forwarding FORWARD; Or port is Multicast Routing port, and the logic state of this port becomes BLOCK from FORWARD, and this node exists multicast user.
8. system as claimed in claim 5, it is characterized in that, described non-working port is that physics is by the port of DOWN.
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| CN201110120018.1A CN102185776B (en) | 2011-05-10 | 2011-05-10 | The method of Ethernet Layer 2 Multicast Fast Convergent and Ethernet system |
| PCT/CN2012/072748 WO2012152134A1 (en) | 2011-05-10 | 2012-03-21 | Rapid convergence method for ethernet layer 2 multicast and ethernet system |
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| CN102185776B (en) * | 2011-05-10 | 2016-03-02 | 中兴通讯股份有限公司 | The method of Ethernet Layer 2 Multicast Fast Convergent and Ethernet system |
| CN102347859B (en) * | 2011-09-26 | 2013-04-10 | 杭州华三通信技术有限公司 | Link rapidly recovering method and device |
| CN105490970B (en) * | 2015-12-08 | 2018-10-30 | 迈普通信技术股份有限公司 | A kind of method, apparatus and system of link Fast Convergent |
| CN105338331B (en) * | 2015-12-16 | 2018-08-24 | 武汉微创光电股份有限公司 | A kind of non-compression video monitoring system and fault recovery method |
| CN113472663B (en) * | 2021-06-25 | 2022-11-18 | 新华三信息安全技术有限公司 | Message forwarding method and device |
| CN117041136B (en) * | 2023-10-10 | 2024-01-23 | 北京国科天迅科技股份有限公司 | Multicast management method, system, device, switch and storage medium |
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| CN101064906A (en) * | 2006-04-26 | 2007-10-31 | 中兴通讯股份有限公司 | Method for shortening called built-up time of mobile communication system |
| CN101145922A (en) * | 2006-09-13 | 2008-03-19 | 中兴通讯股份有限公司 | A system and method for realizing reliable exit of multi-cast terminal |
| CN101521927A (en) * | 2009-04-03 | 2009-09-02 | 中兴通讯股份有限公司 | Method and system for restraining multicast transmitting path |
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| CN101465746B (en) * | 2007-12-17 | 2011-02-16 | 华为技术有限公司 | Method and system for converging multicast network and multicast forwarding device |
| CN102185776B (en) * | 2011-05-10 | 2016-03-02 | 中兴通讯股份有限公司 | The method of Ethernet Layer 2 Multicast Fast Convergent and Ethernet system |
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| CN101064906A (en) * | 2006-04-26 | 2007-10-31 | 中兴通讯股份有限公司 | Method for shortening called built-up time of mobile communication system |
| CN101145922A (en) * | 2006-09-13 | 2008-03-19 | 中兴通讯股份有限公司 | A system and method for realizing reliable exit of multi-cast terminal |
| CN101521927A (en) * | 2009-04-03 | 2009-09-02 | 中兴通讯股份有限公司 | Method and system for restraining multicast transmitting path |
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